1.5 Prerequisites/Preconditions

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The DirectPlay 8 Protocol: NAT Locator extensions assume that a DirectPlay 8 Protocol: Core and Service Providers game session has been established, and that a peer is attempting to join a game session with the host and at least one other existing peer.

The NAT resolver query/response client/server transaction requires that the responding server be configured with a public or global Internet address. The server's direct network access is necessary to respond properly to queries from clients that are behind any devices that perform NAT. The NAT resolver query/response exchange can be performed at any time, but typically occurs when a DirectPlay 8 Protocol: Core and Service Providers host has started.